| CHAP. | I.--Phænomena of Revolving Storms | [7] |
| " | II.--Phænomena of Atmospheric Waves | [13] |
| " | III.--Observations | [18] |
| SECT.I.--Instruments | [19] | |
| SECT. II.--Times of Observation | [28] | |
| SECT. III.--Localities for Additional Observations | [31] | |
| SECT. IV.--Storms, Hurricanes, and Typhoons | [43] | |
| SECT. V.--Seasons for Extra Observations | [48] | |
| " | IV.--Practical Directions for Avoiding the Centres of Storms | [52] |
NOTICE.
In the pocket accompanying this work are two rings of stiff cardboard, on which will be found all the information contained in figures 1 and 2. When they are laid flatly upon a chart, the continuity of the lines on the chart is not materially interfered with, while the idea of a body of air rotating in the direction indicated by the arrows is conspicuously presented to the mind. These rings are more particularly referred to on [page 52].